A "flying casket" designates murderers in DRC, Kenyan police shut down photo exhibit, and more

This show is made up entirely of amateur images. We've seen time and time again how images captured by ordinary citizens then uploaded onto the Web can change history, or at least shift the balance of power. This week, we take a look back at some of those moments.

STORY 1: Kenya

We begin today in Kenya, with a man who's daring to bring up a past that many politicians would rather forget. I'm not talking about that long ago - just five years... the deadly violence that followed the 2007 presidential election. The unrest left bitter wounds throughout Kenyan society that have yet to heal. Our Observer is a photographer. He helped document what happened then - and today he's still making people look at his pictures, in an effort to help the nation come to terms with what happened.

Several leading Kenyan politicians face international charges of crimes against humanity for their alleged roles in the violence. Two of them are running for president in next year's election.

STORY 2: DR Congo

Next up, some disturbing images shot in a village named Kakanda, in the south of the Democratic Republic of Congo. It happened on July 24, after a young man in the village was killed. The video shows a ritual called Londola. A "flying coffin" supposedly identifies a victim's murderer. Our Observer is skeptical.

Three people were killed in Kakanda incident.

STORY 3: World

Next, a look at some of the other images and stories sent in by our Observers this week.

First stop, Algeria, which is facing an influx of more than 12,000 Syrian refugees in just one month. In the capital Algiers, charity groups are looking after the poorest refugees. Our observer Nassima Guettal took these photos in a restaurant that's organizing food collection. This being Ramadan, the restaurant has even managed to find a Syrian chef to help prepare the right meals when the refugees break their fast at the end of the day.

Now to Egypt with our Observer Nasser Mahmoud. Now you've probably heard of the French art of 'parkour' - using urban landscapes as a personal gym for acrobatics and daredevil leaps. The movement has spread to Egypt, in the shadow of the pyramids. Nasser is the coach for a team of 60 athletes, known as 'traceurs'. While he says the sport helps him and his teammates feel free as the wind, they have trouble convincing the local police that they're not vandals and hooligans.

Our last stop today is here in Paris, where earlier this month a fisherman had a surprising catch - a piranha. A real live piranha, in the calm waters of the Canal Saint Martin, in the heart of the city. William Fichard could not believe it when he saw the fish in his net. He knew it couldn't have swum from its home waters in the Amazon, so his best bet is that it was thrown into the canal when someone decided to empty their aquarium. After letting the piranha chew up his net for a few minutes, William did the only thing he could think of - he threw it back into the canal.